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The rotation curve of a disc galaxy (also called a velocity curve) is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre. It is typically rendered graphically as a plot , and the data observed from each side of a spiral galaxy are generally asymmetric, so that data from ...
The spiral galaxy NGC 4622 lies approximately 111 million light-years away from Earth in the constellation Centaurus. NGC 4622 is an example of a galaxy with leading spiral arms. [2] Each spiral arm winds away from the center of the galaxy and ends at an outermost tip that "points" in a certain direction (away from the arm).
Sometimes it is also called turbulence model. In the turbulence scenario, first flattened rotating proto-clusters formed due to cosmic vorticity in the early universe. Subsequent density and pressure fluctuations caused galaxies to form. The idea that galaxy formation is initiated by primordial turbulence has a long history.
The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [ 1 ] [ 2 ] Its central massive object is a supermassive black hole of about 4 million solar masses , which is called Sagittarius A* , [ 3 ] [ 4 ] [ 5 ] a compact radio source which is almost exactly at the galactic rotational ...
VFTS 102 is a star located in the Tarantula nebula, a star forming region in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. The peculiarity of this star is its projected equatorial velocity of ~ 610 km/s (about 2,000,000 km/h ), making it the second fastest rotating massive star known alongside VFTS 285 ( 609 km/s ), and ...
DLA0817g, also known as the Wolfe Disk, [1] is a galaxy located in the constellation Cancer, 12.276 billion light-years (3.764 billion parsecs) from Earth. [2]Discovered in 2017 using observations made with the Atacama Large Millimeter Array (ALMA), it was studied with the Karl G. Jansky Very Large Array (JVLA) observatory and the Hubble Space Telescope.
NGC 1365, also known as the Fornax Propeller Galaxy [2] or the Great Barred Spiral Galaxy, [3] is a double-barred spiral galaxy about 56 million light-years away [4] in the constellation Fornax. It was discovered on 2 September 1826 by Scottish astronomer James Dunlop .